Albert Barnes Commentary Nehemiah 3:11

"Malchijah the son of Harim, and Hasshub the son of Pahath-moab, repaired another portion, and the tower of the furnaces." — Nehemiah 3:11 (ASV)

The other piece - Rather, another piece (as in Nehemiah 3:19, Nehemiah 3:21, Nehemiah 3:27, Nehemiah 3:30). It is conjectured that a verse has fallen out in which Malchijah’s and Hashub’s “first piece” was mentioned.

The tower of the furnaces - Either a tower at the northwestern angle of the city; or, midway in the western wall. The origin of the name is uncertain.